Crusher



April 22 19240 7 1,491,43G

- A. H. STEBBINS CRUSHER Filed Jude 9, 1922 2 Sheets-Sheet 1 lNl/ENTOR.

ATTORNEY Patented Apr. 22, 1924.

UNITED STATES.

PATENT" OFFICE.

Application filed June 9,

I '0 all whom it may concern:

Be it known that I, ALBERT H. STEBBINS, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented an Improvement in Crushers, ofv which thefollow- 1ng description, in connection with the accompanying drawings,is a specification, like characters on the drawings representing likeparts. 1

The invention to be hereinafter described relates to crushing machines.

One feature of the present invention resides in a crusher having a pairof arms mounted in spaced relation to swing about spaced axes so thatthe adjacent faces of the arms will move relatively to each other in thedirection of their length with crushing effect.

Another feature of the invention resides in a crusher provided with jawshaving corrugated or wavy faces arranged to be moved relative to eachother in the direction of the length of the jaws to feed the materialsdownwardly progressively and to crush them.

Another feature of the invention resides in an unbalanced wheel whichserves to rock the pair of arms of the crushing machine back and forthwith crushing effect. By providing an unbalanced wheel to impart rockingmovement to the crushing jaws, danger of breaking the crushing machineupon the introduction of an exceptionally hard piece of material betweenthe jaws is avoided, since the unbalanced wheel is free to vary its pathof movement under different pressures.

Other features of the invention and novel combination of parts inaddition to the above will be hereinafter described in connection withthe accompanying drawings which illustrate one good practical formthereof.

In the drawings:

Fig. 1 is a perspective view of a crusher constructed in accordance withthe present invention, one side support of the crusher being brokenaway;

Fig. 2 is a vertical sectional view of the crusher of Fig. 1;

Fig. 3 is a diagrammatic view showing the pair of crushing jaws swung tothe right; and

Fig. 4 is a. view similar to Fig. 3, showing the crushin jaws swung tothe left.

In the em odiment of the invention illus- 1922. Serial No. 566,896.

trated the crusher is supported upon side rails 10 and these rails arespaced a art to receive the crushing mechanism t erebetween. The crusheris rovided with a pair of swinging arms 11 and 12 pivotally mounted upontransversely extending shafts 13 and 14 and 'the ends of these shaftsare mounted in bearing blocks 15 resting upon the rails 10, and bearingplates 16 are placed over the ends of these shafts and are secured tothe bearing blocks 15 and rails 10 by bolts 17. The adjacent faces ofthe arms 11 and 12 are provided with cooperatin jaws 18 and 19 betweenwhich the materia to be treated is crushed.

In the present case, the depending arm 12 consists of spaced downwardlyextending side members 20 and 21 connected by a trans versely extendingportion to which the jaw 19 is secured, and the arm 11 is similarlyformed and has a transversely extending portion to which the jaw 18 issecured. The arms 11 and 12 are connected so that movement of one is imarted to the other, and in the construction s own the arms 11 and 12 areconnected by links 22 secured to the respective arms by transverselyextending shafts 23 and 24 and these shafts extend through the sidemembers 20 and 21. The arrangement is such that the shafts 23 and 24 areheld a fixed distance apart by the links 22 as the arms 11 and 12 areswung back and forth.

Various means may be employed for imparting the-desired rocking movementto the arms 11 and 12 and in the present case unbalanced rotating wheelsserve to impart this rocking movement. In theconstruction shown, the arm12 extends downwardly some distance beyond the arm 11 and at the lowerend of the arm 12 is provided a shaft 25 which extends through thedownwardly extending side members 20 and 21 and is rotatably supportedthereby. The unbalanced wheels 26 and 27 are secured to the shaft 25 ateach side of the side members 20 and 21, and this shaft may be rotatedby a belt (not shown) engaging a pulley 28 mounted upon the shaft 25.The wheels 26 and 27 may be unbalanced by securing one or more heavyplates 29 to a portion of the wheels as shown. As a result of thisconstruction rotation of the shaft 25 and the unbalanced wheels 26 and27 secured thereto will tend to impart a gyratory movement to the shaft25. This gyratory movement is resisted in a ii v w.

direction toward and from the shaft 14 by the arm 12, but not in adirection at right angles to this arm, and the gyratory movement willserve to swing the arm 12 back and forth about its pivotal mounting 14,and a similar movement will be imparted to the arm 11.'by the links 22.The driving belt that operates the pulley 28 preferably extends upwardlyfrom the pulley in substantially a vertical direction so that itstension will not restrict the swinging'movement of the arm 12.

It will be understood that since the shafts 13 and 14 about which thearms 11 and 12 swing are held a fixed distance apart, rocking movementof the arms 11 and 12 about these fixed pivots will produce a movementof one jaw longitudinally of the other, as will be apparent from Figs. 3and 4, and this serves to crush the materials between the jaws and alsoto exert a rubbing pressure thereupon. The crushing eifect of the jawsmay be increased by providing the same with wavy surfaces orcorrugations which extend transversely of the jaws, as will be aparentfrom the drawings, and the longitudinal movement of one jaw relative tothe other will serve to imprison particles to be crushed between thewavy surfaces or corrugations upon the opposite jaws and crush the sameas the jaws move from the position shown in Fig. 2 to the position shownin either Fig. 3 or Fig. 4. Upon examining the relative position of thecorrugations, as shown in Flgs. 2, 3 and 4, it Wlll be seen that as thearms 11 and 12 are rocked back and forth the corrugated jaws will serveto feed the materials downwardly pro essively and to crush them with arub ing pressure.

It may be desirable to vary the distance between the jaws 18 and 19 tovary the size to which the materials will be crushed and to this end, inthe present case, the transversely extending shafts 23 and 24 extendthrough the eccentric collars 30 which are journalled in the sidemembers 20 and 21. These collars may be provided with notches 31 toreceive a tool adapted to rotate the collars within the sidemembers 20and 21 and the collars may be clam ed in the desired position ofadjustment y set screws 32. The arrangement is such that by rotating theeccentric collars 30 the arms 11 and 12 may be moved relative to theshafts 23 and 24 either towards or from each other.

It may be desirable to provide means for normally retaining thedepending arms 11 and 12 in a predetermined position such, for example,as in a vertical position, and to this end in the present case coiledsprings 33 are provided to act upon the outer faces of the arms 11 and12. One end of these springs may be received in the sockets 34 providedin the bars 35 secured to the side rails 10 and mouse extendintransversely therebetween and the other en of these s rin may abutagainst shoulders 36 upon t e side members 20 and 21 of the dependingarms. If desired the tension upon the springs may be adjusted by bolts37 the inner ends of which en age disks 38 within the sockets 34 and ,wich .may be forced outwardly by the bolts 37.

Materials may be prevented from escaping from the jaws 18 and 19 at thesides thereof by side plates 39 secured to one of the jaws by screws 40and positioned to overlap the other jaw, as will be apparent fromFig. 1. The materials to be ground may be delivered to the jaws 18 and19 by a hopper or other means not shown.

As a result of the construction described, the unbalanced wheels 26 and27 will rock the jaws back and forth with crushing effect but will notexert sufiicient force upon the jaws to break the crusher upon theintroduction of an exceptionally hard piece of material between thejaws. It will therefore be seen that in this construction danger ofbreaking the crushing machine is avoided.

What is claimed 1s:

1. A crusher comprising in combination, a pair of spaced arms mountedfor swinging movement about spaced axes, coo er atmg jaws upon saidarms, means inc uding an unbalanced wheel for imparting rocking movementto one of said arms, and a connection between the arms to impartmovement of one arm to the other and arranged to impart relative slidingcrushing movement to said jaws.

2. A crusher comprising in combination, a pair of spaced arms mountedfor swinging movement about spaced axes, cooperating jaws upon saidarms, an unbalanced wheel carried by one of said arms and rotatable forimparting rocking movement to the arm, and a connection between the armsto impart movement of one arm to the other and arranged to impartrelative sliding crushing movement to said jaws.

3. A crusher comprising in combination, a pair of spaced depending armsmounted for swinging movement about spaced axes,

an unbalanced wheel supported at the lower end of one of said arms androtatableto impart swinging movement to the arm, and a connectionbetween the arms for imparting movement of one arm to the other andarranged to impart relative sliding crushing movement to said jaws.

4. A crusher comprising in combination,

ing means for normally maintaining the arms in a predetermined positionalong the path of swinging movement.

5. A crusher comprising in combination,

a pair of spaced arms mounted for swinging movement, cooperating jawsupon said arms, an operating shaft rotatably supported by one of saidarms and provided with unbalanced means, means for rotating said shaftwith vibratory effect to impart rocking movement to said arm, and aconnection between the arms for imparting movement from one arm to theother.

6. A crusher comprising in combination, a pair of spaced arms mountedfor swinging movement about spaced axes, cooperating jaws upon saidarms, means connecting said arms at points distant from said axes toimpart movement from one arm to the other,

means for imparting rocking movement 'to the arms, and springs foryieldingly resistlng movement of the arms from a predetermined pos1tion.

7. crusher comprising in combination, a pair of spaced arms mounted forswinging movement about spaced axes and extending downwardly from theaxes, cooperating jaws upon said arms, a shaft journaled in andsupported by a downwardly extending portion of one of said arms for freeswinging movement with the arm, means for rotating the shaft withvibratory effect to vibrate said arm, and a connection between the armsto impart movement of one arm to the other.

In testimony whereof, I have signed my name to this specification.

ALBERT H. STEBBINS.

